http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
균일 분포하중을 주는 Flat Wiper 스프링레일의 곡면 형상식 유도
윤영삼(Youngsam Yoon),김철(Cheol Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, a flat wiper which is one piece wiper and is subjected to a pressing force at a single center point is gaining wide applications on automotive windshields. However, nonuniform reactive pressure distributions takes place, so that wiping is not completed at that point. The wiping performance of a flat wiper is best when a wiper and a curved windshield have perfect contact without gaps under the specified pressing force of 13 ~ 15 gf/㎝. Therefore, it is necessary that the optimum curvature of a wiper spring-rail should be obtained. Finite element analysis, CATIA script-macro function, and the least square method were utilized to find out the curvature of a spring-rail for a perfect contact with a windshield under a specified concentrated load. The curvature equation is the third order polynomial.
일점 지지 균일압 Flat Wiper 스프링레일의 최적 곡면식 개발
윤영삼(Youngsam Yoon),김태헌(Taehun Kim) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
Recently, a flat wiper which is one piece wiper and is subjected to a pressing force at a single center point is gaining wide applications on automotive windshields. However, nonuniform reactive pressure distributions takes place, so that wiping is not completed at that point. The wiping performance of a flat wiper is best when a wiper and a curved windshield have perfect contact without gaps under the specified pressing force of 13 ~ 15 gf/cm. Therefore, it is necessary that the optimum curvature of a wiper spring-rail should be obtained. Finite element analysis, CATIA script-macro function, and the least square method were utilized to find out the curvature of a spring-rail for a perfect contact with a windshield under a specified concentrated load. The curvature equation is the third order polynomial.
생활폐기물 소각시설 발전효율 및 온실가스 감축량 산정 연구
배지수(Jisu Bae),윤영삼(Youngsam Yoon),권은혜(Eunhye Kwon),전태완(Taewan Jeon),이영기(Younggi Lee) 한국신재생에너지학회 2018 신재생에너지 Vol.14 No.3
One of the concepts of energy recovery, waste energy has attracted attention as a technology that contributes considerably to the replacement of fossil fuels which are becoming depleted and to the dissemination of renewable energy for Intended Nationally Determined Contributions (INDC). In this study, the long-term operation data of domestic municipal solids waste (MSW) incineration facilities were evaluated for the steam power generation efficiency when applying the elemental technologies. In addition, the energy savings and GHG reductions were calculated by the power generation efficiency increment. In terms of enhancing the capability of waste heat recovery, the power generation efficiency was examined based on the assumption that the low calorific power of 2,000~3,000 kcal/kg, 5,000~7,000 ㎥/ton exhaust gas, boiler outlet temperature of 190~300℃ and the combustion air ratio of 1.0~2.0. When applying elemental technologies to the incineration procedure, the power generation efficiencies were 0.74~0.85%. Energy savings per ton of MSW were estimated to be 79.2 MWh/ton in low temperature economizer (LTE) and 68.8 MWh/ton in low air ratio combustion (LARC). The estimated GHG reductions were 206,072 ton-CO₂/yr in LTE and 178,892 ton-CO₂/yr in LARC. This is expected to reduce operation costs by 4,328 million and 3,757 million KRW by conversion to economic benefits.
Lab-Scale 반응기를 이용한 PCNs 함유 폐기물의 소각처리 가능성 연구
권은혜 ( Eunhye Kwon ),배지수 ( Jisu Bea ),김우일 ( Wooil Kim ),윤영삼 ( Youngsam Yoon ),이원석 ( Wonseok Lee ),박호연 ( Hoyeun Park ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.4
Polychlorinated naphthalenes (PCNs), one of Persistent Organic Pollutants (POPs), and are colorless crystalline substances with similar structure and physical and chemical properties with PCB (polychlorinated biphenyl), and are produced by the chlorination of naphthalene. PCN is one of POPs are rarely degraded in the environment; consequently, they negatively impact the environment by threatening human health and the ecosystem. In this study, the potential of a stable treatment for lab-scale-incinerated waste containing PCNs was evaluated. For this study, waste containing PCNs were selected as the surface coating agent, mixed sample, and technical sample. The results revealed that when the PCNs concentration was 34.552 ~ 2,582.463 ng/g, the concentrations of Mono-CN and Tetra-CN were higher than those of other homologues. The incineration treatment conditions were derived by measuring three parts, after which the elemental composition was analyzed and the calorific value, theoretical air content, and residence time were calculated. Using the temperature of the target sample, thermogravimetric analysis revealed that the incineration treatment can be achieved at the incineration temperature of the existing incineration facility via weight change. Therefore, the incineration temperature was set between 850 and 1,100℃; however, the incineration temperature of the sample containing a high concentration of PCNs was set at 350, 500, 850, and 1,100℃. At 350 and 500℃, high concentrations of CO and NOx were observed, which could be attributed to incomplete combustion. Furthermore, heat-sensitive PCNs showed a de-chlorination reaction between 200 to 440℃. In addition, the decomposition rate (DRE) slightly increased according to the incineration temperature increase.
Lab-Scale 반응기를 활용한 PCP 함유 폐기물의 열적처리 가능성 연구
권은혜 ( Eunhye Kwon ),배지수 ( Jisu Bae ),김우일 ( Woo-il Kim ),박호연 ( Hoyeon Park ),이원석 ( Wonseok Lee ),윤영삼 ( Youngsam Yoon ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회 추계학술발표논문집 Vol.2019 No.-
잔류성유기오염물질(POPs)는 독성, 생체 축적 및 장거리 이동성을 특징으로 인간 건강 및 환경 보호를 위한 국제적 관리가 필요한 물질로써, 스톡홀름협약은 국제적 기준에 따라 POPs 함유 물질을 줄이고 근절하기 위한 조치가 취해지고 있다. 2015년 POPs 검토위원회(POPRC)에서는 HCBD, PCP, PCN 3가지 물질이 새롭게 지정되었다. 본 연구에서는 스톡홀름 협약 제 4 조를 달성하기 위해 새롭게 지정된 물질 중 하나 인 PCP 함유 폐기물의 환경 친화적인 처리를 달성하기 위한 열처리 표준을 확립하고자 했다. PCP 함유 폐기물은 ① 기본 시험(국내 소각 시설 처리 기준 만족, 연소 온도 850℃, 1,100℃) 및 ② 정밀 시험(저온, 연소 온도 300℃, 500℃, 700℃). 6개의 표본(보존 목재, 탄약 목재 상자 등)을 대상 샘플로 선택하고 물리적 특성을 반영하는 열처리 요소를 도출하였다. 기본 실험에서 6개의 시료에 대한 PCP 함량 분석 결과는 0.127 mg/kg ~ 68.4 mg/kg의 농도 범위를 나타내었다. 평균 PCP 분해율은 99.999%였으며, 최대 다이옥신 농도는 4.4794 ngI-TEQ/Sm<sup>3</sup> 검출되었다. 그리고 연소 후 배기가스에서 일반적인 대기 오염 물질의 결과, 산소 15.81 % ~ 18.35 %, CO 53.38 mg/L ~ 6,295.07 mg/L, SOx 8.81 mg/L ~ 64.67 mg/L 및 NOx 5.56 mg/L ~ 26.43 mg/L. 국내법에 제시된 배출 제한 기준과 비교하여 CO 농도는 표준 값을 초과했으며 소량의 소각로 때문에 내부 불완전 연소로 간주되었다. VOC (휘발성 유기화합물)의 경우, 벤젠, 톨루엔 등이 주로 검출되었고, 총 VOC 농도는 1,100℃ 보다 850℃에서 더 높은 경향을 나타냈다. 연소 잔류물에서 중금속의 분석 결과, Cr 및 Ni는 배출 한계 표준을 초과했으며, 이는 반응기 물질의 고온 산화 및 탈착의 결과로 간주되었다. 따라서 본 연구 결과를 바탕으로 다이옥신 전구체로 알려진 PCP로 인한 독성 물질의 생성을 방지하기 위해, 소각로의 안정적인 작동을 위해 소각로 작동 조건을 1,100℃ 및 체류 시간의 2초 이상으로 유지해야 된다고 사료된다.